Vol. 52.] ME. J. E. MAEE ON THE TAENS OF LAKELAND. 15 



depth from 3 to 2 feet, the tarn gradually shallowing towards the 

 south. The normal exit is at the western end, by a stream running 

 through screes (E), and although these screes form so insignifi- 

 cant a feature in the landscape that they might readily be overlooked, 

 and the rest of the lake is surrounded by solid rock, actual measure- 

 ment revealed the fact that the shortest distance from rock to rock 

 near this exit was about 25 feet, so that there is little doubt that 

 this tarn owes its existence to the blocking of one end of a sloping 

 dip-slope between two escarpments by screes. A feature of particular 

 interest was noticeable at the time of my visit after heavy rains. 

 Another stream ran from the middle of the southern side of the tarn 

 from the abnormally high lake-level, over the lower escarpment, 

 along a shallow groove. As this groove must be gradually deepened 

 during wet periods, while the screes are increasing at the exit, 

 the time will arrive when this tarn ceases to be one having its 

 exit over loose material, and sends its surplus waters permanently 

 over the solid rock. We have here an intermediate stage in the 

 process of formation of such tarns as Codale, described in my 

 former paper. 



(c) Hayeswater. 



I examined this large tarn lying below High Street, and south- 

 east of Patterdale, because, in the discussion upon my former paper, 

 it was cited by Dr. Mill as a possible connecting-link between the 

 tarns and the valley-lakes. It lies at an elevation of 1383 feet, 

 and the last rock seen in Hayeswater Beck, which issues from it. is 

 near the point where the 1250 feet contour-line crosses the beck. 

 The tarn might well be deeper than 133 feet, and still be drift- 

 dammed, for the hill on the left bank of the gill has a thick bank 

 of drift running far down Hayeswater Gill valley, and a buried 

 valley of great depth might well exist beneath this. In many 

 places, Hayeswater Beck seems to be cutting its way between rock 

 and drift, as described in the case of the stream from Brund Pell, 

 near Rosthwaite. Hayeswater therefore presents no indications of 

 lying in a rock-basin. 



(d) Angle Tarn, Patterdale. 



This tarn lies on a plateau beneath Place Pell. It is evidently 

 quite shallow, for numerous boulders project above its surface in 

 different parts, and it is hardly likely that anyone would claim it 

 as a rock-basin, with its numerous rocky bays, its two islands and 

 peninsula. It was formed by the stopping of a depression starting 

 from the northern end of the tarn, and running round the rocky 

 knoll north of the present exit, to join the beck proceeding from 

 this exit, a short distance west of the tarn. 



